Rotary plow.



N. MLSON.

ROTARY PLoW.

AYPLIGATION FILED MAY 3, 1909.

Patented-55111.21, 1913.

NILS NELSON, OF WAYZATA, MINNESOTA.

ROTARY Piow.

To all LU/tom t may concern Be it known that I, Nus NiLsoN, of lVafzata Henne )1n count Minnesota .l 7 7 have invented certain new and useful Iniproveinents 111 Rotary Flows, of which the following 1s a specification'.

The ob'ect of 1n i invention is to rovide means in connection with a diskplow,

' having' a large capacity and one which will `the axis of the disk.

be comparatively simple and inexpensive to manufacture and maintain.

In the accompanying drawings, forming part of this specification, Figure l isa plan view, illustrating the rotary plow at work, Fig. 2 is a view looking toward the convex side of the disk, showing the traction blades or wings thereon, Fig. 3 is an edge View of the plow, and Fig. 3 is a sectional View, Fig. 4 illustrates a modified construction with a narrow type of wing or blade, Fig. 5 illustrates the blades reversed on the disk, havingtheirl wide cutting edgesi at the forward end of the wing or blade.

i l'n the drawing, 2 represents a disk, concave on one side and convex on the other, as usual in disks of this type, mounted on a shaft 3. It is my purpose to drive this shaft at a speed greater than the forward moven'ient of the machine, and t'o increase the traction and draw the disk into the soil l provide a series of blades or wings 4l, secured to the convex face of the disk. These lades are preferably arranged shown in Fig. 2, having a wide heel portion 5 tapering to a narrow beak or nose G, the heel portion of each blade being located about midway between the periphery and the axis of the disk and the nose portion near' the edge or periphery of the disk. The blades thus lie obliquely on the curved surface of the disk and l prefer to curve them slightly from end to end, as indicated in Figs. l and 3, and also incline them with respect to By inclining the blades to the axis of the disk, l mean that Specification of Letters Patent.v

Application led May 3, 1909.

Patented dan. 21, i913. Serial No. 493,537.

they vare outwardly turnedor inclined t0- ward the periphery of the disk, so that the angles formed between their inner faces and the surface of the disk will be greater ,than right angles. This inclination of the blades will cause them to resist pressure on the opposite side of the disk. The taper of the wings will allow their forward ends to enter the soil easily and -as the disk revolves faster than it travels forward, the wings will work into the soil and increase the traction of the plow and hold it down to the work. The pressure of the soil on the concave sidel of the disk will tend to work it laterally into th'e land. This will oe off-set by the inclination of the wings, Which, digging into the soil, will tend to counter-act the pressure on the opposite side and hold the disk4 in proper relation to the land and the furrow that is beingformed. The wings, operating on the land side of the disk, will have the etiect of cutting up the soil, so that when the next furrow is turned, the soil will be thoroughly loosened and better results obtained.

ln operating the disk in sod, I prefer to employ the narrow blades 7, illustrated in Fig. 4, which increase the traction of the disk, but will not cut into the sod and chop it up as much as vthe larger'and wider wings would do.

ln F ig. .5, I haveshown another modification, in which the wings 8 are provided with broad cutting edges 9, whir'h are adapted to extend substantially ag'foe's into the soil on the land side of the disk a distance equal substantially to the width of a furrow, thus cutting` up and loosening `the soil preparatory to the turning of the furrow by the disk. It will be understood that any number of these disks may be mounted on the shaft, their operation being substantially the same as that of the disk described above.

I claim as my invention:

A rotary plow comprising a concavo convex disk, a series of wings secured to the convex side of said disk, saidwings being curved longitudinally and gradually decreasingy in width from their rear toward their forward ends, said wings extending obliquely on the surface of said disk with their forward ends adjacent to the periphf gf 1,050,987

- ery thereof, the outer face of each Wing vthe earthA on the convex side of the disk forming an acute angle with the surface of when the Wings enter the soil.

.said disk, and the inner face of each Wing In WitnessV whereof, I have hereunto set;` l

forming an obtuse angle with the surface 'of my hand this 28th `defy of April, 1909.

seid-disk, the space between adjacent Wings NILS NILSON. ektenlng spil-ally on the surface of the `Witnessesz dskythe 'angle of said Wings with respect JEssIE M. SULLIVAN,

t'o the disk counteracting the pressure of J. A.. BYINGTON. 

